Find all Lucene documents having a certain field

Question

I want to find all documents in the index that have a certain field, regardless of the field\'s value. If at all possible using the query language, not the API.

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Answer 1

If you know the type of data stored in your field, you can try a range query. Per example, if your field contain string data, a query like field:[a* TO z*] would return all documents where there is a string value in that field.